This is where that Severus Snape had two daughters that are identical twins and he couldn't tell them apart. When Nina Snape died after her two twin daughters were born, Severus kept his twin daughters secret until it was too late. Even the Dark Lord knew

Glanmore Peakes' Corridor

This corridor is named after Glanmore Peakes, famous slayer of the Sea Serpent of Cromer. There are some display cabinets with skeletons of beasts. There is also a portrait of Peakes, namesake of the corridor, on one of the walls. This corridor links to the East Wing of the Castle.